GROWTH AND CHARACTERIZATION OF PURE AND NI2+ DOPED GLYCINE SODIUM SULFATE CRYSTALS

A.Karolin,K.Jayakumari, C.K.Mahadevan

Abstract: Single crystals of glycine sodium sulfate (GSS), a new semi-organic nonlinear optical (NLO) material, have been grown by the free evaporation method and characterized chemically, structurally, thermally, optically and mechanically. Effect of Ni2+ addition as an impurity on the properties of GSS has also been investigated. X-ray diffraction analysis indicates the crystal system as monoclinic. The functional groups have been identified using Fourier transform infrared spectral analysis. The crystals are found to be thermally stable up to 250°C. The UV-Vis-NIR spectral analysis shows that these crystals have their cut off wavelengths around 250nm. Second harmonic generation (SHG) measurement shows the NLO property. Micro hardness measurement indicates that GSS comes under soft material category. The Ni2+ addition is found to increase the optical transparency and micro hardness whereas it decreases the second harmonic generation efficiency.

Keywords: Crystal growth, Thermal properties, Mechanical properties, Optical properties, X-ray diffraction

DOI: https://doi.org/10.15623/ijret.2013.0212110